Leather-dressing machine



(No Model.) 2 Sheets-Sheet 1.

T. P. OOOMBS. LEATHER DRESSING MACHINE.

No. 437,483. Patented Sept. 30, 1890.

(No Model.) 2 Sheets- Sheet 2.

- T. P. OOOMBS;

v LEATHER DRESSING MACHINE. No. 437,483. Patented Sept. 30, 1890.

UNITED STATES PATENT OFFICE.

THOMAS P. CO OMBS, OF WVOBURN, MASSACHUSETTS.

LEATHER-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 437,483, dated September 30, 189 0. I

Application filed April 23, 1890.

To all whom it may concern.-

Be it known that I, THOMAs P. COOMBS, of -Woburn, in the county of Middlesex, Stateof Massachusetts, have invented certain new and useful Improvements in Leather-Finishing Machines, of which thefollowing is a description sufficiently full, clear, and exact to en able any person skilled inv the art or science -to which said invention appertainsto make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is an elevation of my improved machine; Fig. 2, a sectional elevation showing a modification in the arrangement of the jack-head; Fig. 3, a front elevation of the head, and Figs. 4, 5, 6, and 7 views illustrating details of construction.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

My invention relates especially to machines for glassing, pebbling, or rolling leather; and it consists in certain novel features hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more efiective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters-from the following explanation.

In the drawings, A represents the body or frame of the machine, which consists of' two parallel vertically-inclined standards 5 Z). From the top of the'standards two vertical arms (1 (1 project. A lever f is pivoted by an end in the upper ends of said arms, and a pendulum B ispivoted to the outer end of said lever. A vertically-arranged rod 9 is pivoted centrally to the lever f, its lower end being fitted to slide in a crossbar it, connecting the arms d. Aportion of the rod is screwthreaded and a nut 0; turned thereon. A coiled spring j is disposed around the rod, one end thereof resting on the cross-bar and its upper end secured to a washer is, adapted to engage the nut, whereby the tension of said spring may be regulated. Connecting-rods m m are pivoted centrally to the pendulum B and the tops of the standards I). A driv- Serial N6. 349,201. on model.)

at 19 to the lower end of the pendulum B. A

printing-roll q is mounted on bearings r on the bottom of the head. Arms 75 project longitudinally'froin the foot of the standards. The bed or table Kof the machine is mounted in said arms. Said bed comprises a table proper, to the inner end of which a'vertical rod to is secured. The lower end of the rod is pivoted to an arm of a bell-crank lever 15-, journaled in the standards I). are secured to the. outer end of the table 1) and have their lower ends pivoted to an arm of a bell-crank lever 16, j ournaled in the framearms t. The levers 15 and 16 are journaled Two rods :1: w

in different horizontal planes, so that the table o inclines inward longitudinally. The rodsm as are threaded at 17, and provided with handwheels 18, whereby the incline of said table may be regulated.

A rod 19, parallel with the table .o, is fitted a to slide in cross bars or braces 20 on the arms 25. This rod is screw-threaded at 21',a'nd nuts 22 are mounted on said threaded portions. The bodies of said nuts are grooved'vertically, and the lower arms of the bell-crank levers, respectively, astride them. The outer end of the rod is provided with a hand-wheel 23, and a nut provided with a hand-wheel 24; works on said rod. A coiled spring 25 is disposed between the brace 20 and said hand-wheel 2 and acts expansively to force said rod outward. A check-nut engages the inner face of the brace 20 and determines the outward movement of the rod. By rotating said rod the nuts 22 are caused to travel thereon and move the bell-crank levers 15 and 16 and adjust the table 4) vertically, as desired.

The form of head H shown in Fig. 2 comprises a bell-crank lever 30, pivoted to the crank-rod D, said rod being pivoted to the lower end of the pendulum at 31. In one arm of the lever 30 a rubbing-glass 32 is secured in place of the roll q. The opposite arm of the lever is connected with the pendulum B above the pivot 31 by means of a pivoted rod 35.

In the use of my improvement, power beingapplied to the Wheel 0 by means of the pendulum B, connecting-rods m, and crank D, and pivoting the head H to said crank and pendulum, as described, an oscillating movement is imparted to said head. The leather being adjusted on the table 1; in the ordinary manner, the head is constantly in engagement therewith during its movement, as best shown in Fig. 2. When the crank passes the center and its pivot on the wheel 0 is above the axle thereof, on its return the compound levers and and pivot between the crank and pendulum cause the head to be elevated out of contact with the leather during the forward movement. By this arrangement of levers a new portion of the glass surface is constantly presented to the leather, said glass being mounted in a bell-crank lever and constantly assuming a diiferent vertical plane as the pendulum swings inward, and said bell-crank .is thereby actuated. This imparts a much finer and more permanent polish to the leather than when the same portion of the glass is constantly in contact therewith. Said table being adjustable by means of the rod 19, the force of the contact of the glass on the leather is readily fixed. Said table being mounted on the levers 15 and 16, connected with the sliding rod 19, the spring 25, interposed be-i tween the brace 20 and a nut on said rod, serves to cushion the table against the pressure of the head. By imparting an oscillating pendulum movement to the head, as described, the leather may be much more quickly and thoroughly treated than in machines of this class wherein'the head has a movement parallel with the bed. By means of the screwrods :1: the incline of the table 12 may be more accurately adjusted, so that the head will engage the leather with equal force during its entire stroke.

Having thus explained my invention, what I claim is- 1. In a leather-dressing machine, the combination, with the levers 15 and 16, of the table 1:, mounted on rods to w, pivoted to corresponding arms of said levers, the sliding rod 19, bearing the nuts 22, connected with the opposite arms of said levers, the nut'24, and spring 25, arranged to operate substantially as described.

2. In a leather-dressing machine, a frame and a drive-Wheel and crank-rod bearing the head, in combination with a lever pivoted on said frame, a spring-cushioned rod pivoted centrallyto said lever, a pendulum pivoted to the outer end of said lever and to said head, and a connecting-rod pivoted to said frame and centrally to said pendulum, substantially as described.

3. In a leather-dressing machine, the combination of a frame, a drive-wheel and crank rod, a head comprising a boll-crank lever pivoted to said rod, a lever pivoted in saidf-rame, a spring-cushioned sliding rod pivoted to said lever, a pendulum pivoted to said lever and crank-rod, a connecting-rod pivoted centrally to the pendulum and to said frame, and a pivoted lever connecting said pendulum and bell-crank lever, substantially as described.

4-. In a leather-dressing machine, the combination of a frame, a bell-crank lever thereon, an inclined table mounted on rods respectively pivoted to an arm of said lever, the rods connecting with one lever being threaded to adjust the incline of said table, a spring-cushioned sliding rod connecting with the opposite arms of said levers for adjusting said table vertically, and a stop adjustable on said rod for limiting the movement thereof in one direction,substantially as described.

THOMAS P. COOMBS. Witnesses:

O. M. SHAw, K. DURFEE. 

